Illuminating spot size & intensity changed by condenser lens
Condenser (optics) - Wikipedia
Telecentric condensers
Anatomy of a Microscope - Substage Condensers | Olympus LS
Microscope Condensers
Condenser Lenses|SUMITA OPTICAL GLASS, Inc.
Uncoated Aspheric Condenser Lens
Anatomy of a Microscope - Substage Condensers | Olympus LS
Parts and components of light microscopes | Light Microscope
WILD HEERBRUGG PHASE CONDENSER OPTICS MICROSCOPE PART AS PICTURED Z1-A-170 | eBay
Uncoated Aspheric Condenser Lens
Optical imaging featuring both long working distance and high spatial resolution by correcting the aberration of a large aperture lens | Scientific Reports
26.5 mm Focal Length - Aspheric Condenser Lens - Plano